Granted Patent
Utility
US 6,333,446 · App. 08/091,039
Hazardous waste transportation and disposal
Inventor:
Robert M. Rumph
Patented Case
View Patent ↗
Granted: Dec 25, 2001
Filed: Apr 20, 1993
Inventor
Robert M. Rumph
Assignee (at issue)
The Maitland Company, LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.